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Finding the Fourth Proportional to 586.90, 809.14 and 469.30

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Solution

The fourth proportional to 586.90, 809.14 and 469.30 is: 647.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    586.90 : 809.14 = 469.30 : x
  2. Step 2: Convert to fraction form
    586.90/809.14 = 469.30/x
  3. Step 3: Cross multiply
    586.90x = 809.14 × 469.30
  4. Step 4: Simplify right side
    586.90x = 379,729.40
  5. Step 5: Solve for x
    x = 379,729.40/586.90
  6. Step 6: Final answer
    x = 647.01

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.